Abstract: The present invention is directed to a novel valve for an introducer and a method for using the introducer valve to facilitate the insertion of one or more medical devices into a patient's body. The introducer valve of the present invention includes two or more valves seals adapted to form a seal around medical devices having a wide range of sizes. In one embodiment, the valve includes a longitudinal passageway for receiving a medical device, a first seal forming a seal across longitudinal passageway, and an annular second seal, wherein an aperture of the second seal is defined by a semi-toroidal portion that forms a curved inner surface that forms a seal with the medical device.